Copy your desktop by clicking “prtscn”.
Past it in paint program.
Save this file as JPG format.
Now open this image file and make it desktop wallpaper.
Right click on desktop, click on “arrange icon by”, now click on “hide
desktop icon” to hide all the icons from your desktop
Now “unlock” the taskbar. Done.
Your desktop will be look like original but you can’t click on any icon.